vim-patch:8.0.1587: inserting from the clipboard doesn't work literally

Problem:    inserting from the clipboard doesn't work literally
Solution:   When pasting from the * or + register always assume literally.
3324d0a864

src/nvim/ops.c

@@ -842,6 +842,15 @@ static bool is_append_register(int regname)
   return ASCII_ISUPPER(regname);
 }
 
+/// @see get_yank_register
+/// @returns true when register should be inserted literally
+/// (selection or clipboard)
+static inline bool is_literal_register(int regname)
+  FUNC_ATTR_CONST
+{
+  return regname == '*' || regname == '+';
+}
+
 /// Returns a copy of contents in register `name`
 /// for use in do_put. Should be freed by caller.
 yankreg_T *copy_register(int name)
@@ -1152,11 +1161,12 @@ static int put_in_typebuf(
  */
 int insert_reg(
     int regname,
-    int literally                  /* insert literally, not as if typed */
+    bool literally_arg            // insert literally, not as if typed
 )
 {
   int retval = OK;
   bool allocated;
+  const bool literally = literally_arg || is_literal_register(regname);
 
   /*
    * It is possible to get into an endless loop by having CTRL-R a in
@@ -1326,12 +1336,14 @@ bool get_spec_reg(
 /// register contents will be interpreted as commands.
 ///
 /// @param regname   Register name.
-/// @param literally Insert text literally instead of "as typed".
+/// @param literally_arg Insert text literally instead of "as typed".
 /// @param remcr     When true, don't add CR characters.
 ///
 /// @returns FAIL for failure, OK otherwise
-bool cmdline_paste_reg(int regname, bool literally, bool remcr)
+bool cmdline_paste_reg(int regname, bool literally_arg, bool remcr)
 {
+  const bool literally = literally_arg || is_literal_register(regname);
+
   yankreg_T *reg = get_yank_register(regname, YREG_PASTE);
   if (reg->y_array == NULL)
     return FAIL;